Resistive switching and filament formation in VO<sub>2</sub> vertical devices

ORAL

Abstract

Vanadium oxides exhibit electrically-triggered, volatile, resistive switching and provide a promising opportunity to mimic spiking neurons for neuromorphic computing. The control of the physical properties of these oxides is an important requirement to develop oxide electronics for future technology. However, a detailed understanding of the non-volatile filamentary formation in these Mott materials is still lacking. In this work, we investigated the mechanisms behind volatile and non-volatile resistive switching in electrically-driven VO2 vertical devices. By using electrical transport measurement and in-situ transmission electron microscopy, the metal-insulator transition properties of the conductive filament and its nanoscale lattice structure are studied. Our works address the important issues in resistive switching based neuromorphic technologies.

*Work supported by the Quantum Materials for Energy-Efficient Neuromorphic Computing (Q-MEEN-C) Energy Frontier Research Center (EFRC), funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award DE-SC0019273.

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Presenters

  • Minhan Lee

    • Materials Science and Engineering, University of California-San Diego

Authors

  • Minhan Lee

    • Materials Science and Engineering, University of California-San Diego

  • Shaobo Cheng

    • Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Canadian Centre for Electron Microscopy and Department of Materials Science and Engineering, McMaster University

  • Javier del Valle

    • University of California, San Diego
    • Center for Advanced Nanoscience, Department of Physics, University of California-San Diego
    • Department of Physics, University of California San Diego
    • UCSD

  • Yimei Zhu

    • Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Brookhaven National Laboratory
    • Brookhaven National Lab
    • Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Department of Energy Science and Technology, Brookhaven National Laboratory

  • Ivan Schuller

    • University of California, San Diego
    • Department of Physics, University of California San Diego
    • Center for Advanced Nanoscience, Department of Physics, University of California-San Diego